<template>
  <div class="app-container">
    课程列表
    <!--查询表单-->
    <el-form :inline="true" class="demo-form-inline" align="center">
      <el-form-item>
        <el-input v-model="courseQuery.title" placeholder="课程名称"/>
      </el-form-item>

      <el-form-item>
        <el-select v-model="courseQuery.status" clearable placeholder="课程状态">
          <el-option value="Normal" label="已发布"/>
          <el-option value="Draft" label="未发布"/>
        </el-select>
      </el-form-item>

      <el-button type="primary" icon="el-icon-search" @click="getPageCourse()">查询</el-button>
      <el-button type="default" @click="resetData()">清空</el-button>
    </el-form>

    <!-- 表格 -->
    <el-table
      :data="list"
      fit
      highlight-current-row
      align="center"
      >

      <el-table-column
        label="序号"
        width="70"
        align="center">
        <template slot-scope="scope">
          {{ (page - 1) * limit + scope.$index + 1 }}
        </template>
      </el-table-column>

      <el-table-column prop="title" label="课程名称" width="110" />

      <el-table-column label="课程状态" width="80">
        <template slot-scope="scope">
          {{ scope.row.status==='Normal'?'已发布':'未发布' }}
        </template>
      </el-table-column>

      <el-table-column prop="lessonNum" label="课时数" width="90"/>

      <el-table-column prop="gmtCreate" label="添加时间" width="160"/>

      <el-table-column prop="viewCount" label="浏览数量" width="90" />

      <el-table-column label="操作" width="200" align="center">
        <template slot-scope="scope">
          <router-link :to="'/course/list/tolist/'+scope.row.id">
            <el-button type="primary" size="mini" icon="el-icon-edit" class="btn">编辑课程基本信息</el-button>
          </router-link>
          <router-link :to="'/course/list/chapter/'+scope.row.id">
            <el-button type="primary" size="mini" icon="el-icon-edit" class="btn">编辑课程大纲息</el-button>
          </router-link>
          <el-button type="danger" size="mini" icon="el-icon-delete" class="btn" @click="removeDataById(scope.row.id)">删除课程信息</el-button>
        </template>
      </el-table-column>
    </el-table>

  <!-- 分页 -->
    <el-pagination
      :current-page="page"
      :page-size="limit"
      :total="total"
      style="padding: 30px 0; text-align: center;"
      layout="total, prev, pager, next, jumper"
      @current-change="getPageCourse"
    />
  </div>
</template>
<script>
//引入调用teacher.js文件
import course from '@/api/edu/course'

export default {
    //写核心代码位置
    data() { //定义变量和初始值
        return {
          list: null,//查询之后接口返回集合
          page: 1,//当前页
          limit: 10,//每页记录数
          total: 0,//总记录数
          courseQuery: {} //条件封装对象
        }
    },
    created() { //页面渲染之前执行，一般调用methods定义的方法
        // 初始化课程信息
        this.getPageCourse()
    },
    methods:{  //创建具体的方法，调用teacher.js定义的方法
       //获取课程信息
       getPageCourse(page =1){
           this.page = page
           course.getPageCourseInfo(this.page,this.limit,this.courseQuery)
           .then(response => {
               //返回课程数据赋值给list
               this.list = response.data.records
               this.total = response.data.total
           })
       },
       resetData(){ //清空查询条件的数据
          this.courseQuery = {}

          this.getPageCourse()
       },
       removeDataById(courseId){
             //提示信息
             this.$confirm('此操作将删除课程, 是否继续?', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
            }).then(() => {  //点击确定，执行then方法
                //调用删除的方法
                course.deleteCourse(courseId)
                    .then(response =>{//删除成功
                    //提示信息
                    this.$message({
                        type: 'success',
                        message: '删除课程成功!'
                    });
                    //刷新页面
                    this.getPageCourse()
                })
            })
       }
    }
}
</script>
<style scoped>
  .btn {
    margin-top: 10px;
    width:150px
  }
</style>
